Multiple crypto maps on an interface cisco

The traffic between both the routers is protected and encrypted by IPsec. In this section, we will discuss about configuring two VPN tunnels on the same router interface. This configuration is required if you have two branch offices at different locations and you want to connect each branch office to head office. The R2 and R3 routers are located in Sydney and Singapore respectively.

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Multiple crypto maps on an interface cisco

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• Set up an IPSEC VPN
• LearnIOS.com
• Cisco – IPSec Tunnel Termination via HSRP
• IPSec tunnel between Cisco IOS router and AWS VPC. Static VTI and crypto map with HSRP redundancy.
• Security Chp8 Lab A Site2Site VPN Instructor
• Site to Site VPN between a SonicWall firewall and a Cisco IOS device
• Configuring and Applying Crypto Maps
• Subscribe to RSS
• Configure QoS for VPN Tunnel on Cisco Router

WATCH RELATED VIDEO: (CRYPTO MAP) - IPSEC VPN BETWEEN CISCO ROUTER USING CRYPTO MAP

Set up an IPSEC VPN

Save Digg Del. Managing Cisco Network Security. This section presents the steps used to configure IPSec. Subsequent sections discuss each configuration step in detail. Optional Configure global IPSec security association lifetimes with the crypto ipsec security-association lifetime command.

Table summarizes IPSec encryption policy details that will be configured in examples in this chapter. Crypto access lists perform the following functions for IPSec:.

Process inbound traffic in order to filter out and discard traffic that should have been protected by IPSec. Determine whether to accept requests for IPSec security associations for the requested data flows when processing IKE negotiations. You must use access lists to create crypto access lists. The crypto access lists identify the traffic flows to be protected.

Although the crypto access list syntax is the same as that for regular access lists, the meanings are slightly different for crypto access lists: permit specifies that matching packets must be encrypted, and deny specifies that matching packets need not be encrypted. Crypto access lists behave similar to an access list applied to outbound traffic on a PIX Firewall interface.

You can configure interesting traffic with crypto access lists. You define a crypto access list with the access-list configuration command. To delete an access list, use the no form of the command. The command syntax is as follows:. Does not select a packet for IPSec protection. Prevents traffic from being protected by crypto in the context of that particular crypto map entry.

Selects a packet for IPSec protection. Causes all IP traffic that matches the specified conditions to be protected by crypto, using the policy described by the corresponding crypto map entry. Specifies the name or number of an IP protocol.

It can be one of the keywords icmp , ip , tcp , or udp , or an integer representing an IP protocol number, or an integer in the range 1 to representing an IP protocol number.

To match any Internet protocol, use the keyword ip. Specifies the address of the network or host from which the packet is being sent or from where the packet was received. There are three other ways to specify the source or destination:. Use the keyword any as an abbreviation for a source and source-netmask or destination and destination netmask of 0.

This keyword is normally not recommended for use with IPSec. Use host source or host destination as an abbreviation for a source and source-netmask of Specifies the netmask bits mask to be applied to source or destination. There are three other ways to specify the source or destination netmask:. Use a bit quantity in four-part, dotted-decimal format. Place zeroes in the bit positions you want to ignore.

Use the keyword any as an abbreviation for a source and source-netmask or destination and destination-netmask of 0. This keyword is not recommended. Use host source or host destination as an abbreviation for a source and source-netmask of source Optional Specifies a port or a port range to compare source or destination ports.

Possible operands include lt less than , gt greater than , eq equal , neq not equal , and range inclusive range. The range operator requires two port numbers. Each of the other operators requires one port number. Specify ports by either a literal name or a number in the range of 0 to You can specify all ports by not specifying a port value. PIX Firewall version 5. A new tunnel is created for each port. Any unprotected inbound traffic that matches a permit entry in the crypto access list for a crypto map entry flagged as IPSec will be dropped.

If you want certain traffic to receive one combination of IPSec protection for example, authentication only and other traffic to receive a different combination of IPSec protection for example, both authentication and encryption , you need to create two different crypto access lists to define the two different types of traffic.

Cisco recommends that you avoid using the any keyword to specify source or destination addresses. The permit any any statement is strongly discouraged because it causes all outbound traffic to be protected as well as all traffic sent to the peer specified in the corresponding crypto map entry and requires protection for all inbound traffic. Then, all inbound packets that lack IPSec protection are silently dropped.

Also, you might experience increased CPU utilization and accompanying network throughput degradation. Try to be as precise as possible when defining which packets to protect in a crypto access list. If you must use the any keyword in a permit statement, you must preface that statement with a series of deny statements to filter out any traffic that would otherwise fall within that permit statement that you do not want to be protected.

See the "Step 3: Create Crypto Access Lists" section of Chapter 16 for more details on how to configure crypto access lists. Cisco recommends that you configure mirror-image crypto access lists for use by IPSec. The crypto access lists on each peer should be symmetrical. The access list's criteria are applied in the forward direction to traffic exiting the PIX Firewall and are applied in the reverse direction to traffic entering the PIX Firewall. When a PIX Firewall receives encrypted packets from an IPSec peer, it uses the same access list to determine which inbound packets to decrypt by viewing the source and destination addresses in the access list in reverse order.

Example shows a crypto access list pair and illustrates why symmetrical access lists are recommended refer to Figure for a network diagram. Network address translation is configured on the PIX Firewalls. The host at Site 1 of The host at Site 2 of The access lists use the global address in the static command to specify interesting traffic.

For traffic from the Site 1 host to the Site 2 host, the access list entry on PIX 1 is evaluated as follows:. For incoming traffic from the Site 2 host to the Site 1 host, the same access list entry on PIX 1 is evaluated as follows:. A transform set is a combination of individual IPSec transforms that enact a security policy for traffic. During the IKE IPSec security association, negotiation occurs during quick mode in IKE Phase 2, when the peers agree to use a particular transform set for protecting a particular data flow.

Transform sets combine the following IPSec factors:. You define a transform set with the crypto ipsec transform-set configuration command. To delete a transform set, you use the no form of the command. Specify up to three transforms. Transforms define the IPSec security protocol s and algorithm s. Up to three transforms can be in a set.

The default mode for each transform is tunnel. Make sure you configure matching transform sets between IPSec peers. When IKE is not used to establish security associations, a single transform set must be used. The transform set is not negotiated. Choosing IPSec transform combinations can be complex. The following tips might help you select transforms that are appropriate for your situation:.

Also consider including an ESP authentication transform or an AH transform to provide authentication services for the transform set. To ensure data authentication for the outer IP header as well as the data, include an AH transform.

Some suggested combinations are shown in Examples and As with Cisco routers, AH is seldom used with ESP because authentication is available with the esp-sha-hmac and esp-md5-hmac transforms.

AH can be used for data authentication alone, but it does not protect the confidentiality of the packet contents because it does not encrypt. Transform sets are negotiated during quick mode in IKE Phase 2 using previously configured transform sets.

You can configure multiple transform sets and then specify one or more of the transform sets in a crypto map entry. You should configure the transforms from most-secure to least-secure as per your policy. The transform set defined in the crypto map entry is used in the IPSec security association negotiation to protect the data flows specified by that crypto map entry's access list.

During the negotiation, the peers search for a transform set that is the same at both peers, as shown in Figure When such a transform set is found, it is selected and is applied to the protected traffic as part of both peers' IPSec security associations. IPSec peers agree on one transform proposal per SA unidirectional. The PIX Firewall supports a global lifetime value that applies to all crypto maps. The global lifetime value can be overridden within a crypto map entry.

The lifetimes apply only to security associations established via IKE. Manually established security associations do not expire. When a security association expires, a new one is negotiated without interrupting the data flow.

You can change global IPSec security association lifetime values by using the crypto ipsec security-association lifetime configuration command. To reset a lifetime to the default value, use the no form of the command. Specifies the number of seconds a security association will live before it expires. The default is 28, seconds 8 hours.

LearnIOS.com

Toggle SideBar. Service and Support. Home More. Important Sophos has retired this product on 30 March For product details on end of life and migration strategies, see the Cyberoam end of life calendar. Throughout the article we have used network parameters as shown in the diagram below.

Cisco – IPSec Tunnel Termination via HSRP

Save Digg Del. Managing Cisco Network Security. This section presents the steps used to configure IPSec. Subsequent sections discuss each configuration step in detail. Optional Configure global IPSec security association lifetimes with the crypto ipsec security-association lifetime command. Table summarizes IPSec encryption policy details that will be configured in examples in this chapter. Crypto access lists perform the following functions for IPSec:. Process inbound traffic in order to filter out and discard traffic that should have been protected by IPSec. Determine whether to accept requests for IPSec security associations for the requested data flows when processing IKE negotiations. You must use access lists to create crypto access lists.

IPSec tunnel between Cisco IOS router and AWS VPC. Static VTI and crypto map with HSRP redundancy.

This way when the routers fail over, your VPN tunnel will failover also. Here in the HSRP router configs you will notice that there are two new commands. The redundancy command was added to the cyrpto map interface command and the name command was used on the standby group. You name the standby group and then reference this in the crypto statement. Filed under Cisco , Networking Click here to cancel reply.

Security Chp8 Lab A Site2Site VPN Instructor

Find answers to your questions by searching across our knowledge base, community, technical documentation and video tutorials. WAN: IP LAN: Cisco IOS. WAN: LAN: IP

Site to Site VPN between a SonicWall firewall and a Cisco IOS device

Network Engineering Stack Exchange is a question and answer site for network engineers. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. We are going to setup multiple site-to-site tunnels to our remote office and every tunnel configuration is identical same hash,encryption etc. The question is: Do I need to create a separate isakmp policy for each tunnel or do I just define a single policy and it will share the policy with multiple crypto map phase 2 configurations?

Configuring and Applying Crypto Maps

As shown in Figure , Router A is the enterprise branch gateway and Router B is the enterprise headquarters gateway Cisco router. IP addresses of branches and headquarters are configured beforehand. The branch communicates with the headquarters over the public network. The branch is located on the network segment

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RELATED VIDEO: LabMinutes# SEC0026 - Cisco Router Site-to-site (L2L) IPSec IKEv1 VPN with VRF (crypto map \u0026 VTI)

The scenario is as following: There is a central HQ site which will be the Hub of our VPN network and also two branch sites which will be the spokes in our VPN network see diagram below. The central HQ site will have a dynamic crypto-map while the branch sites will have a static crypto map. By configuring the central site with a dynamic crypto-map it means that the remote branch sites can have a dynamic public IP address. The branch sites will have a static crypto-map because for them the remote site i. There are no changes on the spoke sites, i. When, however, traffic is initiated from the spoke site branch then the VPN tunnel will be established and the connection will be bidirectional between branch and HQ.

Configure QoS for VPN Tunnel on Cisco Router

As of ASA version 9. Multi-peer crypto map allows the configuration of up to a maximum of 10 peer addresses to establish a VPN, when a peer fails and the tunnel goes down, IKEv2 will attempt to establish a VPN tunnel to the next peer. In total this takes approximately 2 minutes to failover. The diagram below represents the topology used in this guide. The following configuration is common amongst all ASA used in this scenario. Create objects to reflect the DC and Branch1 sites. Create a crypto map, reference the following: —.

I have a customer who has a router behind a router that is being used for VPN tunnels. I can get one site-to-site tunnel working, but I can't add more than one crypto map to that interface. I'm guessing I need a sub interface to add the second tunnel to.